Compositions comprising thiocarbamic acid derivatives and method of using same

ABSTRACT

Pharmaceutical compositions which have utility as antimycotics in the treatment of fungal infections which are pathogenic to humans and animals wherein the active ingredient is an N(aryloxy-thiocarbonyl)-benzothiazine and method of using same.

Unlted States Patent 1 [111 3,91 1,126

Boshagen et a1. Oct. 7, 1975 COMPOSITIONS COMPRISING THIOCARBAMIC ACID DERIVATIVES AND [52] US. Cl. 424/246; 260/243 METHOD OF USING SAME [51] Int. Cl. A61K 31/54 58 F id is h 4 [75] Inventors: Horst Biishagen, Haan, Rhineland; I e 0 earc 24/246 Manfred Plempel, WuppertaLElberfeld, both of [56] References cted Germany UNITED STATES PATENTS Assigneel Bayer Aktiengesenschaft Germany 3,661,927 5/1972 Zivkovic et a1. 260/243 1 Filedi y 1974 Primary Examiner.1erome D. Goldberg 211 Appl. No.: 466,719

[57] ABSTRACT Related US. Application Data Pharmaceutical compositions which have utlhty as an- [62] Dmslo" of 8- Sept I973 timycotics in the treatment of fungal infections which abandoned, which is a dlVlSlOn of Ser. No. 25,557, A r 3 [970 Pat No 3 729 473 are pathogenic to humans and animals wherein the acp tive ingredient is an N-[aryloxy-thiocarbonyl1- [301 Foreign Applicafion Priority Dam benzothiazme and method of using same.

Apr. 5, 1969 Germany 1917739 20 Claims, No Drawings COMPOSITIONS COMPRISING THIOCARBAMIC ACID DERIVATIVES AND METHOD OF USING SAME This is a division of application Ser. No. 292,484 filed Sept. 27, 1973, now abandoned which in turn is a division of Ser. No. 25,557 filed Apr. 3, 1970, and which issued as US. Pat. No. 3,729,473 on Apr. 24, l973.

The present invention is concerned with thiocarbamic acid derivatives, to a process for their production, to pharmaceutical compositions useful for the treatment of mycotic infections and to methods of treating mycotic infections in humans and animals.

More particularly, the present invention is concerned with compounds of the formula:

Ar-OCS- (I) wherein X, Y, R and n are as above defined, with a thiocarbonic acid ester halide of the formula:

Hal- CS-O-Ar (111) wherein Hal is halogen and Ar is as above defined.

It is preferred that the lower alkyl, lower alkoxy and lower alkylmercapto moieties set forth above contain from 1 to 4 carbon atoms in the alkyl portion. These moieties may be straight or branched chain.

The preferred halogens are fluorine, chlorine or bromine.

The preferred aromatic moieties are those which contain up to 12 carbon atoms in the aromatic portion and the preferred moieties are phenyl and naphthyl. The preferred substituents on the aromatic moieties are halogen, especially fluorine, chlorine or bromine, lower alkyl or lower alkoxy, and particularly lower alkyl of l to 4 carbon atoms or lower alkoxy of l to 4 carbon atoms.

Heterocyclic compound (Il) may be used in the form of a salt.

According to one embodiment of the process of the present invention the sodium salt of the heterocyclic base (1]) is first formed (eg in a suitable solvent such as hexamethylphosphoric acid triamide (HMPA), dimethyl formamide (DMF) toluene or benzene) with the use of, for example, sodium hydride, and is subsequently reacted with the thiocarbonic acid ester chloride at a slightly elevated temperature (about 30 to about 50C).

Obviously, it is also possible to react the heterocyclic base as such with the carbonic acid ester chloride in a suitable solvent, for example CHCL CH Cl benzene, toluene, ethanol, methanol or acetone, and with the addition of a tertiary base, for example triethylamine or N,N-dimethyl-benzylamine.

The heterocyclic bases and ester halides used as starting material are known and can be obtained by known methods.

Working up the reaction mixtures may be carried out in the usual way.

The excellent antimycotic effect of the newly prepared compounds is surprising and could not be foreseen, since after the elaborate investigations of T. Noguchi, Y. Hashimoto, K. Myazaki and A. Kayi, J. Pharm. Soc. Japan, 88 (2), 227-234 (1968), 88 (3), 335343 (1968), 88(3), 344-352 (1968) and 88 (3), 353-358 1968) it has hitherto been assumed that only compounds of the type have an antimycotic effect and even these only if R denotes a methyl group.

The excellent antimyrotic activity of the compounds of the present invention may be shown by the following inhibition values (minimum inhibition concentration i.e. MIC) in relation to a variety of fungi pathogenic to humans and animals. 2,3-dihydro-N-[naphthyl-(2)- oxy-thiocarbonyl]-l,4-benzothiazine was selected as a compound representative of those of the present invention and the MICs of this compound against various fungi and listed below in Table 1.

Table Germ Minimum inhibition concentration -y/ per ml test medium without serum with serum Tric/mp/rymn menmgropli. l y l y Trichoplzymn equinum l y 4 'y Tricllophylon \erucosum l y l 'y 'Iritliop/iytun ruhrum var. Alglxhonosu l y l 7 'll'iclmphylun rularum nu". Ycsusa l y l 'y 'li-icI10p/1 \'I0n tum'enlricmn l y Triclmp/iymn .sclzuenlz'in 4 y Micmsporum felinemn l y Micrux xirum auzlouinii l y Micmxpormn gallinac 40 'yl y 50% inhibition Chromonrvces Carrion! 40 -y l -y 40 -y l 7 =50% inhibition 50% inhibition Epidcrmoplrvlun flot'r'os. l y 4 y Noc'ardiu brusiliensis 4 y= 50% inhibition Candida albicuns y Spormriclmm 40 'y 40 -y C'nyzrococcus neufirrmanx 40 'y 40 -y Madurelle grisea 40 'y 40 y Table Continued Germ Antimycotic Effect in Animal Test The representative compound tested in Table 1 exhibits a very good effect in a model experiment with trichophytia caused in guinea pigs by Tric'lmplzymn mentagrophytex, when ().5 and 1% solutions were locally applied once daily, starting with the third day after infection. until the eighth day after infection. A rapid retrogression of the primary symptoms of infection (reddening of the skin and loss of hair) takes place, and the animals can be considered completely cured on the 10th day after infection. A typical course of infection is illustrated in Table 2.

Table 2 combating fungal infections caused by the following fungi:

Tric/zup/zymu i'errm'uslml 'l'l'ic/wp/rvtrm quiuckeanum 'lriclzupliymn rubrum Yi'iclmplrvlon me!ltagmpliyles Tric/mp/rvmn gullinue as well as Microsporon species, particularly Microsporon canis and felineum.

In general, it has proved advantageous to administer locally formulations containing about 1% to about 2% of active ingredient once to twice daily, in order to achieve effective results. Nevertheless it may be necessary to deviate from the aforesaid amounts, depending on the body weight of the test animal and the method of application, but also on the animal species and the individual reaction to the medicament, and of the type of formulation and the moment in time or the interval at which application takes place. In some cases it may be sufficient to use less than the aforesaid minimum amount whereas in other cases it will be necessary to Test groups post infection Evaluation of course of infection after days Untreated 1 2 3 4 5 6 control:

1st animal 0 0-1 0-1 1 2 2-3 2nd animal 0 0-1 0-1 1 1-2 2 3rd animal 0 0-1 0-1 1 1-2 2 3 Substance (a) (of Example 1) lst animal 0 tl-l l l l 1 2nd animal 0 0-[ l 1 0-1 0-1 3rd animal 0 0-1 1 l 1 1 Substance (b) 19? as control lst animal 0-1 1 1 0-1 2nd animal ()-1 l 1 1 Substance (c) 1st animal ()-1 l 1 0-1 2nd animal ()-1 1 1 0-1 3rd animal 0-1 0-1 1 ()-1 Substance (d) l 2 3 4 5 6 1st animal 0-1 0-1 0-1 0-l 2nd animal 0-] 0-1 0-1 0-] 3rd animal 0-1 0-1 0-1 0-1 Substance (e) lst animal 1 l-2 0-1 0-1 2nd animal 1 1-2 1 0-1 3rd animal 0-I [-2 0-1 ()-I 4th animal 1 1 0-1 0-1 1 1-2 1-2 l- 2 0-1 1 l-2 l-2 0-1 1 1 2 l l l-2 l-2 In table 2, substance (a) compound of Example 1 (h) 3-methyl-N-methyl-N-l naphthyl- (2 )-oXy-thiocarboriyl l-aniline (for comparison).

(c) Compound of Example 24.

(d) Compound of Example 25.

(e) compound of Example 42.

Explanation of numbers: 1 reddening; reddening and beginning of loss of hair; 3 strong loss of hair; 4 beginning of bleeding ulceration; 5 expansive bleeding ulcerations.

A primary fungicidal effect on Dermatophytes could be found in thc Warburg test for the new compound ta) at concentrations of0.2 to l -y/ml substrate.

The compounds of the present invention are useful 6 go beyond the aforesaid upper limit. If larger amounts for the treatment of fungal infections in both humans and animals. With regard to the veterinary medicine aspects, they have been found especially suitable for are administered. it may be advisable to distribute these over the day in several individual doses. The same range of dosage is envisaged for application in human medicine, and the other explanations given above apply analogously.

The compounds of the present invention can be applied alone or in combination with pharmaceutically acceptable diluents or carriers. Suitable forms for application in combination with various inert carriers are powders, sprays, aqueous suspensions, elixirs, syrups and the like. Such carriers comprise solid extenders or fillers, a sterile aqueous medium as well as nontoxic organic solvents and the like. In the aforesaid case, the therapeutically active compound should be present at a concentration of about 0.5 to 90 percent by weight of the total mixtures, that is to say in quantities which suffice to achieve the above range of dosage.

1n the case of aqueous suspensions and/or elixirs. the active ingredients can be used together with diluents such as water, ethanol, propylene glycol, glycerol and similar compounds or combinations of this type.

The invention further provides a medicament in dosage unit form comprising at least one of the new active compounds either alone or in admixture with a solid or liquid diluent or carrier. The medicament may include a protective envelope containing the active compound and, if used, the diluent or carrier.

The term medicament in dosage unit form as used in the present specification means a medicament as defined above in the form of discrete portions each containing a unit does, or a multiple or sub-multiple of a unit dose of the active compound or compounds. Such portions may, for example, be in monolithic coherent form, such as tablets, suppositories, pills or dragees; in wrapped or concealed form, such as wrapped powders, cachets, sachets, or capsules; in ampoules, either free or as a sterile solution suitable for parenteral injection; or in any other form known to the art.

The invention also provides a method of combating fungus infections in humans and animals (especially domestic animals) which comprises applying to the animals at least one of the new active compounds either alone or in admixture with a solid or liquid diluent or carrier.

The following non-limitative example more particularly illustrates the present invention.

EXAMPLE 37.8 g (0.25 mol) 2,3-dihydro-1,4-benzothiazine were dissolved in 250 ml hexamethyl-phosphoric acid triamide and 1 1.3 g (0.25 mol) sodium hydride (53.3% in paraffin) were added. The mixture was stirred at room temperature until the evolution of hydrogen had stopped (about 30 minutes). Subsequently, 55.7 g (0.25 mol) O-B-naphthyl-thiocarbonic acid ester chloride were slowly added, the mixture was stirred at room temperature for minutes and then at 50C for 15 minutes. The reaction solution was poured into 2.5 litres of water, the precipitated crude product was filtered off with suction, the adhering smears were removed by stirring with some acetone, and the product was recrystallized from dioxan/ethanol.

64.5 g (76.5%) 2,3-dihydro-N-[naphthyl-(2)- oxythiocarbonyl]-l,4-benzothiazine were obtained in the form of slightly yellowish prisms of m.p. 133C.

The following compounds were obtained in an analogous way:

2. 2,3-Dihydro- 6-methyl-N- naphthyl-( 2 )-oxythiocarbonyl]- 1 ,4-benzothiazine. After recrystallisation from dioxan/ethanol, the compound forms colourless small cuboids of m.p. 128C.

3. 2,3-Dihydro-6-trifluoromethyl-N-[naphthyl-( 2 oxy-thiocarbony1]- 1 ,4-benzothiazine. Colourless coarse prisms from dioxan/ethanol; m.p. 126C.

4. 2,3-Dihydro-2-methy1-N-[naphthyl-(2)-oxythiocarbonyl l ,4-benzothiazine. Colourless rectangular flakes (dioxan/ethanol) of m.p. 169C.

5. 2,3-Dihydro-2,6-dimethyl-N[naphthyl-(2)-oxythiocarbonyl]-l ,4-benzothiazine. Colourless prisms from dioxan/ethanol; m.p. 154C.

6. 2,3-Dihydro-5 ,6-benzo-N- naphthyl-( 2 )-oxythiocarbonyl]-1,4-benzothiazine. Colourless prisms of m.p. 164C from dioxan/ethanol.

7. 2,3-Dihydro-N-[4-fluorophenoxy-thiocarbonyl]- 1,4-benzothiazine. Colourless hexagonal flakes (dioxane/ethanol) of m.p. 124C.

8. 2,3-Dihydro-N-[4-chlorophenoxy-thiocarbonyll- 1,4-benzothiazine. Shiny colourless scaly flakes (dioxan/ethanol) of m.p. C.

9. 2,3 ,4,5-Tetrahydro-N- naphthyl-( 2 )-oxythiocarbonyl]-1 ,S-benzothiazepine. After recrystallisation from dioxan ethanol, colourless small prisms of m.p. 167C.

10. 2,3-Dihydro-N-[ naphthyl( 2 )-oxy-thiocarbonyl 1,4-benzoxazine. Colourless broad prisms (dioxan) of m.p. 181C.

1 1. 2,3-Dihydro-6-methyl-N-[naphthyl-( 2 )-oxythiocarbonyl}1,4-benzoxazine. Colourless prisms of m.p. 143C from dioxan.

12. 2,3-Dihydro-6-methoxy-N-[naphthyl-( 2 )-oxythiocarbonyl]-1,4-benzoxazine. Colourless prisms (dioxan/ethanol) of m.p. 158C.

13. 2,3-Dihydro-2,7-dimethyl-N-[naphthyl-( 2 )-oxythiocarbonyl 1 ,4 benzoxazine. Colourless small prisms (dioxan/ethanol) of m.p. 144C.

14. 2,3-Dihydro-2methyl-N-[naphthyl-( 2 )-oxythiocarbonyl]-1,4-benzoxazine. Colourless prisms of m.p. 158C from dioxan/ethanol.

15. 2,3-Dihydro-2,6-dimethyl-N-[naphthyl-( 2 )-oxythiocarbony1]-1 ,4-benzoxazine. After recrystallisation from dioxan/ethanol, colourless prisms of m.p. 132C.

16. 2,3-Dihydro-2-methyl-6methoxy-N-[naphthyl- (2 )-oxy-thiocarbonyl]- 1 ,4-benzoxazine. Colourless rectangular flakes (dioxan/ethanol) of m.p. 151C.

1 7. 2,3-Dihydro-N-[naphthyl-( 2 )-oxy-thiocarbonyl indole. Colourless prisms of m.p. 162C from dioxan/ethanol.

1 8. 2,3-Dihydro-2-methyl-N- naphthy1-( 2 )-oxythiocarbonyl]-indole. Colourless prisms of m.p. 138C from dioxan.

19. 1 ,2,3,4-Tetrahydro-N-[naphthyl-( 2 )-oxy-thiocarbonyl]-quinoline. Almost colourless prisms of m.p. 122C from dioxan/ethanol.

20. 1 ,2,3,4-Tetrahydro-6-methyl-N-[naphthyl-(2)- oxy-thiocarbonyl]-quinoline. After recrystallisation from ethanol, colourless, thin, matted small needles of m.p. 128C.

21. 1,2,3,4-Tetrahydro-2-methyl-N-[naphthyl-(2 oxy-thiocarbonyl]-quinoline. Colourless thin small needles of m.p. 147C from dioxan/ethanol.

22. l,2,3,4-Tetrahydro-5-methyl-N-[naphthyl-(2)- oxy-thiocarbonyl]-quinoline. Colourless prisms (from ethanol) of m.p. 121C.

23. 1 ,2,3,4-Tetrahydro-7-methyl-N-[naphthyl-( 2 oxy-thiocarbonyl]-quinoline. Colourless small needles (from ethanol) of m.p. 1 14C.

Compound No.

Acid Reactant Base Reactant acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride 4-Fluorophenyl-thio carbonic acid ester chloride 4-Chlorophcnyl-thiocarbonic acidester chloride B-Naphthyl-thiocarbonic acid ester chloride fl-Naphthyl-thiocarbonic acid ester chloride fi-NaphthyLthiocarbonic acid ester chloride 4-Chlorophcnylthiocarbonic acid ester chloride fiNaphthyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride fi-Naphthyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride B-Naphthyhthiocarbonic acid ester chloride 4Chlorophenyl-thiocarbonic acid ester Chloride 4-Chlorophenyl-thiocarbonic acid ester chloride 4Chlorophenyl-thiocarbonic acid ester chloride 4 Chlorophenyl-thiocarbonic acid ester chloride 4-Chlorophenyl-thio carbonic acid ester chloride 4-Chlorophenyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride [3-Naphthylthiocarbonic acid ester chloride ,8Naphthyl-tl1iocarbonic acid ester chloride 4-Chlorophenyl-thiocarbonic acid ester chloride 4 Chlorophenyl-thiocarbonic acid ester chloride 4-Chlorophcnyl-thiocarbonic acid ester chloride B-Naphthyl-thiocarbonic acid ester chloride methyl-quinoline l ,2,3,4-Tetrahydro-7- methyl-quinoline 1 ,2,3,4-Tetrahydro-8- methyl-quinoline l ,2-Dihydro-4,6-dimethylquinoline B.p. 0,5/98-l03 1.2-Dihydro-4-methylquinoline 1 ,2,3 ,4-Tetrahydromethyl-quinoline l,2,3,4-Tetrahydro-8- methyl-quinoline l ,2,3,4-Tetrahydro-4- oxo-quinoline l ,2,3,4-Tetrehydrol methyl-6-methylmercaptoquinoxaline B.p. 0.5/l64l66168 l,2,4,5-Tetrahydro-2- methyl- 1 -ethyll ,S-benz'odiazepine 2,3-Dihydrol ,4bcnzoxa zine 2,3,4,5-Tetrahydro-2 methyl-1 ,S-benzothiazepine B.p. 0.()l/8()83 l,2,3,4-Tetrahydro3 methyl-quinoline B.p. OTIS/74 l,2,3,4-Tctrahydro-6,8- dimethyl-quinoline 1,2,3 .4-Tetrahydro 4,6,7- trimethyl-quinoline M.p. 55 (Prismen/Ligroin) l,2,3,4 Tetrahydro-3,8- dimethyl-quinoline l ,2,3,4-Tetrahydroquinoline l,2,3 4'Tetrahydro-6- methylquinoline l ,2,3,4-Tetrahydro-2- methyl-quinoline l ,2,3,4-Tetrahydro-3- methylquinoline l 2,3 4-Tetrahydro-4- methyl-quinoline l,2,3,4 Tetrahydro-4,6- dimethyl-quinoline 1 ,LDihydro-quinoline LZ-Dihydro-S-methy'lquinoline B.p. 0.1/69-74 1,2-Dihydro-3-methylquinoline M.p. 73 l,2-Dihydro-4,6-dimethylquinoline l,2-Dihydro-3-methyl quinoline l ,2-Dihydro-8-me'thylquinoline l ,2,3.4-Tctrahydro-4- methyl-q uinoline B. 0.4/7780 What is claimed is:

l. A pharmaceutical composition useful for the treatment of mycotic infections in humans and animals which comprises as the active ingredient an antimycotically effective amount of a compound having the formula:

wherein Ar is halophenyl or 2-naphthyl;

R is hydrogen or alkyl of l to 4 carbon atoms; and

n is 1, 2 or 3.

3. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-N-[naphthyl-(2)-oxythiocarbonyl]- 1 ,4-benzothiazine.

4. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-6-methy1-N-[naphthyl-(2)-oxythiocarbonyl 1 ,4-benzothiazine.

5. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-6-trifluoromethyl-N-[naphthyl- 2 )-oxythiocarbonyl l ,4-benzothiazine.

6. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-2-methyl-N-[naphthyl-(2)-oxythiocarbonyl]- l ,4-benzothiazine.

7. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-2,6-dimethyl-N-[naphthyl-(2)- oxy-thiocarbonyl 1 ,4-benzothiazine.

8. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-N-[4-fluorophenoxythiocarbonyl]-1 ,4-benzothiazine.

9. The composition of claim 2 wherein the active ingredient is 2,3-dihydroN{4-chlorophenoxythioearbonyl l ,4-benzothiazine.

10. A method of treating mycotic infections in humans and animals which comprises administering to said human or animal an antimyeotically effective amount of a compound having the formula:

Y CH CH(CH or wherein Ar is halophenyl or 2-naphthyl; Y is CH- ,CH or -CH(CH;,)CH- R is hydrogen or alkyl of l to 4 carbon atoms; and n is l, 2 or 3.

l2. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-N-[naphthyl-(2)-oxythioearbonyl l ,4-benzothiazine.

13. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-6-methyl-N-[naphthyl- (2 )-oXy-thiocarbonyl l ,4-benzothiazine.

14. The method according to claim 11 wherein the active ingredient is 2,3-dihydro--trifluoromethyl-N- [naphthyl-( 2 )-oxy-thiocarbonyl]-l ,4-benzothiazine.

15. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-2-methyl-N-[naphthyl- (2 )-oXy-thiocarbonyl l ,4-benzothiazine.

16. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-2,6-dimethyl-N- [naphthyl-(2)-oxy-thiocarbonyl]-1,4-benzothiazine.

17. The method according to claim 11 wherein the active ingredient is 2,3-dihydroN-[4-flu0rophenoxythioearbonyl]-1,4-benzothiazine.

18. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-N-[4'chlorophen0xythioearbonyl]-1,4-benzothiazine.

19. A pharmaceutical composition useful for the treatment of mycotic infections in humans and animals which comprises as the active ingredient an antimyeotically effective amount of 2,3-dihydro-5,6-benzo-N- [naphthyl-( 2 )-oxy-thiocarbonyl l ,4-benzothiazine.

20. A method of treating mycotic infections in humans and animals which comprises administering to said human or animal an antimyeotically effective amount of a composition of claim 19.

l l l l 

1. A pharmaceutical composition useful for the treatment of mycotic infections in humans and animals which comprises as the active ingredient an antimycotically effective amount of a compound having the formula:
 2. The pharmaceutical composition of claim 1 wherein the active ingredient is a compound of the formula:
 3. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 4. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-6-methyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 5. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-6-trifluoromethyl-N-(naphthyl-(2)-oxythiocarbonyl)-1, 4-benzothiazine.
 6. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-2-methyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 7. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-2,6-dimethyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4 -benzothiazine.
 8. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-N-(4-fluorophenoxy-thiocarbonyl)-1,4-benzothiazine.
 9. The composition of claim 2 wherein the active ingredient is 2,3-dihydro-N-(4-chlorophenoxy-thiocarbonyl)-1,4-benzothiazine.
 10. A METHOD OF TREATING MYCOTIC INFECTIONS IN HUMANS AND ANIMALS WHICH COMPRISES ADMINISTERING TO SAID HUMAN OR ANIMAL AN ANTIMYCOTICALLY EFFECTIVE AMOUNT OF A COMPOUND HAVING THE FORMULA:
 11. The method according to claim 10 wherein the active ingredient is a compound of the formula:
 12. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-N-(naphthyl-(2)-oxy-thiocarbonyl)-1, 4-benzothiazine.
 13. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-6-methyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 14. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-6-trifluoromethyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4 -benzothiazine.
 15. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-2-methyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 16. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-2,6-dimethyl-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4 -benzothiazine.
 17. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-N-(4-fluorophenoxy-thiocarbonyl)-1,4-benzothiazine.
 18. The method according to claim 11 wherein the active ingredient is 2,3-dihydro-N-(4-chlorophenoxy-thiocarbonyl)-1,4-benzothiazine.
 19. A pharmaceutical composition useful for the treatment of mycotic infections in humans and animals which comprises as the active ingredient an antimycotically effective amount of 2,3-dihydro-5,6-benzo-N-(naphthyl-(2)-oxy-thiocarbonyl)-1,4-benzothiazine.
 20. A method of treating mycotic infections in humans and animals which comprises administering to said human or animal an antimycotically effective amount of a composition of claim
 19. 